Port plug 15/20 (for volumetric cell)
https://www.scientificgear.shop/shop/k20-06280-k550-0074-port-plug-15-20-for-volumetric-cell-29794
https://www.scientificgear.shop/web/image/product.template/29794/image_1920?unique=c13c026
K550-0074: Port plug 15/20
